定性仿真在锅炉状态监控和故障诊断中的应用

本文简要地介绍了定性仿真方法的发展及其在锅炉状态监控和故障诊断中的应用,并以某一300 MW 电站锅炉对流受热面为例,使用改进的半定量仿真器仿真出一段时间内的对流受热面出口温度的上下闭界,并与进行了定性化处理的出口温度测量数据流在动态范围内相交,有效地减少对流受热面出口温度的上下闭界,模型精炼后减少了原约束方程中参数的不确定性,使得后面进行的仿真结果更精确,从而证明使用该方法进行状态监控和故障诊断切实可行.

THE APPLICATION OF QUALITATIVE SIMULATION TO PROCESS MONITORING AND FAULT DIAGNOSIS OF BOILER

This paper briefly introduced the development of qualitative simulation and its application to process monitoring and fault diagnosis of boiler. In this article, an example of a convection heating surface of a 300MW power plant was discussed. According to an improvement method based on semi-quantitative simulator, we derived the envelopes of delivery temperature in a short span, intersected the simulation results with the qualitatived processing observations, decreased the uncertainty of the model's parameters and refined the model. The simulation example demonstrated the method is valid for process monitoring and fault diagnosis.